/Engine/Plugins/Experimental/Mutable/Source/CustomizableObject/Classes/MuCO/CustomizableInstanceLODManagement.h
Sets how many of the nearest instances to the player will have updates with priority over LOD changes, only works if LODs are enabled with b.NumGeneratedInstancesLimitLODs.
void SetNumberOfPriorityUpdateInstances ( int32 NumPriorityUpdateInstances )